Effect of Preparation Methods of Bi_(2)O_(3) Nanoparticles on their Photocatalytic Activity  

作　　者：DING Peng DU Yao-guo XU Zi-li 

机构地区：[1]Department of Environment Science,College of Environment and Resources,Jilin University,Changchun 130023,P.R.China [2]Department of Chemistry,Changchun Normal College,Changchun 130032,P.R.China

出　　处：《Chemical Research in Chinese Universities》2004年第6期717-721,共5页高等学校化学研究(英文版)

基　　金：the National Natural Science Foundation of China(No.2 0 2 770 15 )

摘　　要：Bi 2O 3 nanoparticles were prepared by means of ammonia precipitation, polyol mediated methods and microemulsion chemical method. The structure and properties of the as-prepared nanoparticles, having been submitted to a heat-treatment test at 750 ℃, were characterized by means of XRD, BET, XPS and UV-Vis absorption techniques. The photocatalytic oxidation reactions of benzene, toluene and xylene were used as the model reaction to measure the photocatalytic activity of Bi 2O 3 nanoparticles, respectively. The results show that the crystallite size of Bi 2O 3 prepared with different methods and calcined at 750 ℃ were 50.6, 38.5 and 31.5 nm, respectively. The photocatalytic activity of Bi 2O 3 nanoparticles prepared with the microemulsion chemical method was higher than that of the particles prepared with the polyol mediated method; and that of the particles prepared with the micromulsion chemical method was the highest among the three. The degradation rates of the three pollutants xylene, toluene and benzene decreased in sequence.Bi_(2)O_(3) nanoparticles were prepared by means of ammonia precipitation, polyol mediated methods and microemulsion chemical method. The structure and properties of the as-prepared nanoparticles, having been submitted to a heat-treatment test at 750 ℃, were characterized by means of XRD, BET, XPS and UV-Vis absorption techniques. The photocatalytic oxidation reactions of benzene, toluene and xylene were used as the model reaction to measure the photocatalytic activity of Bi_(2)O_(3) nanoparticles, respectively. The results show that the crystallite size of Bi_(2)O_(3) prepared with different methods and calcined at 750 ℃ were 50.6, 38.5 and 31.5 nm, respectively. The photocatalytic activity of Bi_(2)O_(3) nanoparticles prepared with the microemulsion chemical method was higher than that of the particles prepared with the polyol mediated method; and that of the particles prepared with the micromulsion chemical method was the highest among the three. The degradation rates of the three pollutants xylene, toluene and benzene decreased in sequence.

关 键 词：Bi_(2)O_(3) Preparation method CHARACTERIZATION Photocatalytic activity 

分 类 号：O643.3[理学—物理化学]